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Table 3 Baseline Characteristics of the CXE study population

From: Design and conduct of Caudwell Xtreme Everest: an observational cohort study of variation in human adaptation to progressive environmental hypoxia

  Group 1
(Trekkers)
Group 2
(Investigators)
Group 2 Subgroup
(Climbers)
Group 2 subgroup
(Lab staff)
  number (%) number (%) number (%) number (%)
Total 198 (100) 24 (100) 14 (100) 10 (100)
Male 125 (63) 18 (75) 12 (86) 6 (60)
Previous Altitude Exposure(>3500 m) 85 (43) 23 (96) 14 (100) 9 (90)
Previous Extreme Altitude Exposure (>5000 m) 37 (19) 21 (88) 14 (100) 7 (70)
Smoker 13 (7) 0 (0) 0 (0) 0 (0)
Race - white 191 (97) 22 (92) 12 (86) 10 (100)
  Mean (SD) Mean (SD) Mean (SD) Mean (SD)
Age 44.7 (13.7)
(range: 18-73)
35.2 (9.3)
(range: 19-59)
36 (6.9)
(range: 22-47)
34 (12.2)
(range: 19-59)
Height cm 173 (9.2) 176 (7.0) 178.4 (5.9) 172.7 (2.2)
Weight kg 75.2 (13.6) 77.2 (12.4) 97.8 (0.9) 72.2 (9.5)
BMI 25.1 (3.2) 24.8 (2.9) 25.3 (3.3) 24.1 (2.2)
Hb g/dl 14.5 (1.2) 14 (0.9) 14.2 (0.7) 13.6 (0.9)
Hct 43.7 (2.6) 43.9 (3.4) 43.9 (2.1) 43.5 (3.2)
SpO2% 97.7 (1.6) 97.9 (1.0) 97.9 (1.1)  
Oxygen content mls/l 196.3 (16.2) 190.1 (11.6) 193.9 (10.0) 184.7 (12)
VO2max mls 2862 (799) 3624 (599) 3785 (505) 3398 (671)
VO2max mls/kg 38.2 (8.5) 47.2 (7.6) 47.4 (8.6) 47.0 (6.5)